Wear-compensating bolt



.G. C. MONCKMEIER WEARA COMPENSAUNG BOLT April 12,1927.

Original Filed May 14. 1924 Pageniea Apr. 12, 1927.

l ,1,624,499 UNITED STATES vriaiEu'r" Hoi-lg-lcE.v

Gusrnv anoncxmmaa, or.k c mcaco, mrimors.

WEAB-COMPENSATING BOLT.

Original application 1ed Iay 14,1924, Serial No. 713,151. Divided and this application led Iarch'l,

` 1926. Serial No. 94,136.

This invention has to do with wear com- Ipensating bolts of the type wherein the spring which is used to advance the nut along the bolt is secured at one end tol a washer on the bolt.

`The object of .the invention is to provide an improved connection between thewasher and the bolt for'holdingthe former against rotation on the latter. Other objects and advantages will be apparentupon an understanding of the construction, arrangement and operation ofA a bolt embodying the 'connection of the invention.. f' Y One form of the connectionis herein disclosed, but it will be understood that such form is presented merely for the purposeof exemplification as the connection is quite ob-l viously susceptible of embodiment in other modified forms coming equally within the scope of the invention as defined in the' would otherwise develop between the part claims.-

' In the accompanying drawing: i Fig. 1 is a side view of a connecting rod which is e uipped with two of the wear com pensating olts of the-invention;

gig. 2 is a different side view .of the rod; an v i Fig. 3 is an enlarged sectional view' The connecting rod illustrated in the drawing is provided with a detachable cap 10 which cooperates with the lower end 11 of the rod to 'form-a cylindrical bearing for a aligned apertures in the parts 1() 'and 11,

journal 12. The 'parts 10 and 11 ofthe rod are lined with semi-cylindrical bushings 13 and 14 which bear directly against the journal, and the bushings are so proportioned as to hold those portions of the parts which arel at opposite sides 'of the journal in slightly spaced relation to each other whereby to allow'for contraction of the parts as wear occurs between the bushings and the journal.' The parts 10 and 11 are held together by two bolts 15 and 1 6 which pass through. aligned apertures therein. The bolts are duplicates of each other and only one therefore need be described.

The bolt lf3-differs from other bolts used for the purpose ofwear compensation in that Vit is provided, beyond the threaded shank portion 17, with'a squared shank portion 18, and, beyond the squared portion 18 with a rounded'shank portion 19. The bolt has in through the rod, showing the boltsin detail;

association therewith a nut 20, a washer 21, a torsion spring 22 and a resiliently yieldable member 23. VThe nut 20 has a threaded bore for screw engagement with the 'threaded portion 17 ofthe bolt;` the washer 21 has a squared bore for non-rotatable engagement with the squared portion 18 and nonrotatable engagement with therounded portion 19'; the torsion spring 22 is secured at its opposite ends to the nut andthe washer;

and the resiliently yieldable memberp23 is positioned between the'nut and the part 10.

A Cotter pin 24 passes through the rounded portlon 19 of the bolt 16, and serves to prevent the washer from moving out of locked engagement with the squared portion 18.

- The spring 22, when tensioned by the washer, tends to advance the nut helically Ialong the threadedportion of the bolt, and

serves to compensate for wear in the'bearing y by taking up with the nut the looseness'which 10 and the nut as the result of such wear. The member 23 normally maintains a' small amount of clearance between the part 10 and the nut, and serves to permita correspondingly limited amount of retraction of thel parts 10 and 11 away from eaclr'otherirrespective ofthe nut to compensate vfor such conditions as are caused byjournals which are temporarily-expanded under heat or journals whichfhave become out-of-round through wear.

In service, the bolt is positioned in the and is held against turning therein by a flattened face 25 on the otherwise rounded head of the 'bolt which fits contiguollsly against a flattened shoulder ou the part 11. The' member 23 is placed on the upper face of the nut 20, or on the threaded portion 17 of the bolt, and the nut is screwed along the threaded portion into a position wherein the nut, acting through the member, holdsl the parts 10 Aand 11 snugly againstthe journal 12. The washerl 21 -is rotated von the rounded portion 19. of the bolt until the,l

lMay 14, 1924, which application matured into Patent No. 1,585,309, dated May 18, 1926. i

I claim:

1. In a device of the class described, the combination of a bolt having an extension on its threaded end, the inner portion of the extension being angular in cross section and the outer portion being circular in cross section, a nut, a Washer, and a spring having one end connected tothe nut and the other end to the Washer for automaticall advancing the nut on the bolt, the Wasier being adapted to be turned on the outer portion ot the extension to place the spring under stress and then seat-ed and held against movelncnt on the inner portion of the extension.

2.111 a device of the class described, a bolt having a threaded portion, a non-circular portion beyond the threaded portion, and a circular portion beyond the noncircular portion, a nut positioned on the threaded portion, a Washer positioned on thel non-circular portion and having a nonrirrular bore which will rotate on the circu lar portion but will interlit with the noncirrular portion, and a coil spring secured at its opposite ends to the nut and Washer.

ln a device of the class described, a holt having a threaded portion, a non-circu- `lar portion beyond the threaded portion and a circular portion beyond the non-circular portion, a nut positioned on the threaded portion, a Washer positioned on the noncircular portion and having a non-circular bore which will rotate on the circular portion but will intert with the non-circular portion, a coil spring secured at its opposite ends to the nut and washer, and a cotter pm passing through a transverse aperture in theeircular portion for holding the` Washer in position on the non-circular portion after it has been rotated on the circular portion to tension the sprinff.

f1. In a device of the class described, a bolt having a threaded portion, a Washer-loclring portion beyond the threaded portion, and a Washer-jonrnalling portion beyond the Washer-locking portion, a nut positioned on the threaded portion, a Washer positioned on the washer-locking portion and having a bore whirh will rotate on the journallingr portion but is so shaped as to lock against rotation on the washer-locking portion, and a coil spring secured -at its opposite ends to the nut and Washer.

5. In a device ot the Class described, Ia bolt having a threaded portion, a Washer locking portion beyond the threaded por tion, and a ivasher-journalling portion bevond the washer-locking portion, a nut polsitioned on the threaded portion, a washer positioned on the washer-locking portion and having a bore which will rotate on the journalling portion but is so shaped as to lock against rotation on the Washer-locking portion, and a coil spring secured at its opposite ends to the nut and washer, said Washerjournalling portion being transversely apertnred for the reception of a Cotter pin.

In testimony whereof I have hereunto subscribed my name.

GUSTAV o. MovoKMinnR.v 

